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Is my wife right? Now with even more wrong husband
Again, as in "Is my wife right?" ( <http://www.mathworks.com/matlabcentral/cody/problems/149-is-my-wife-right> ), answer 'yes' r...

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Is my wife right?
Regardless of input, output the string 'yes'.

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Right and wrong
Given a vector of lengths [a b c], determines whether a triangle with those sides lengths is a right triangle: <http://en.wikipe...

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Set the array elements whose value is 13 to 0
Input A either an array or a vector (which can be empty) Output B will be the same size as A . All elements of A equal to 13...

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Find the sum of the elements in the "second" diagonal
Find the sum of the elements in the diagonal that starts at the top-right corner and ends at the bottom-left corner.

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Add two numbers
Calculate the sum of two numbers. Example input = [2 3] output = 5

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Find the largest value in the 3D matrix
Given a 3D matrix A, find the largest value. Example >> A = 1:9; >> A = reshape(A,[3 1 3]); >> islargest(A) a...

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Why do I have this error when I try to derivative a function with variable x?
Hi, here you are trying to compute numerical differentiation and thus, you need to use these commands: o = (diff(U)./di...

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contour map for stress distribution
HI, Here is a corrected code: X =linspace(-4.5,4.5); R=linspace(-4.5,4.5) ; [X,Y] = meshgrid(X,R); Z= 3426.8/63.3+660*X*4...

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How to divide the original matrix into different matrices according to the strings
Hi, Here are some corrections made in your code: .. STR = cell(1,num); M_ORE = zeros(R1,C1,num); for j = 1 : num S...

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DG Optimization through IEEE 14 bus bar system
Hi, Here is a Simulink model of IEEE 14 Bus System: https://www.mathworks.com/matlabcentral/fileexchange/46067-ieee-14-bus-s...

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Help - How to plot a graph with multiple colors?
Hi, Here are corrected part of your script: ... for k1 = 1:4 for k2 = 1:4 str =[ str; num2str(max(an(k1)...

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Study of oscillations and how to solve in MATLAB
Hi, Everything is working ok with Symbolic MATH. You have made a mistake in your code. Here is corrected code with one numeri...

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How I can fix the error in Custom equation
Hi, you should check your data first and have a scope of what are your data ranges along x, y, .... Here is a good discussio...

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Triangle sequence
A sequence of triangles is constructed in the following way: 1) the first triangle is Pythagoras' 3-4-5 triangle 2) the s...

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Pi Digit Probability
Assume that the next digit of pi constant is determined by the historical digit distribution. What is the probability of next di...

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Help to draw a graph of a function.
Hi, Here is the complete code: clc; clearvars; a=1; d0=2; v0=2; nu=sqrt(2.5); sumxx=[]; k=1000; T=linspace(0,2...

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Interpolator
You have a two vectors, a and b. They are monotonic and the same length. Given a value, va, where va is between a(1) and a(end...

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Dimensions of a rectangle
The longer side of a rectangle is three times the length of the shorter side. If the length of the diagonal is x, find the width...

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Side of a rhombus
If a rhombus has diagonals of length x and x+1, then what is the length of its side, y? <<https://imgur.com/x6hT6mm.png>> ...

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Area of an Isoceles Triangle
An isosceles triangle has equal sides of length x and a base of length y. Find the area, A, of the triangle. <<https://imgur...

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Is this triangle right-angled?
Given three positive numbers a, b, c, where c is the largest number, return *true* if the triangle with sides a, b and c is righ...

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Find a Pythagorean triple
Given four different positive numbers, a, b, c and d, provided in increasing order: a < b < c < d, find if any three of them com...

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Sum of diagonal of a square matrix
If x = [1 2 4; 3 4 5; 5 6 7] then y should be the sum of the diagonals of the matrix y = 1 + 4 + 7 = 12

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Make one big string out of two smaller strings
If you have two small strings, like 'a' and 'b', return them put together like 'ab'. 'a' and 'b' => 'ab' For extra ...

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Sorted highest to lowest?
Return 1 if the input is sorted from highest to lowest, 0 if not. Example: 1:7 -> 0 [7 5 2] -> 1

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Tell me the slope
Tell me the slope, given a vector with horizontal run first and vertical rise next. Example input: x = [10 2];

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Bottles of beer
Given an input number representing the number of bottles of beer on the wall, output how many are left if you take one down and ...

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Distance walked 1D
Suppose you go from position 7 to 10 to 6 to 4. Then you have walked 9 units of distance, since 7 to 10 is 3 units, 10 to 6 is 4...

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How to find the position of an element in a vector without using the find function
Write a function posX=findPosition(x,y) where x is a vector and y is the number that you are searching for. Examples: fin...

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